Fair enough. I was just thinking that "ever devised" is a tall order, and perhaps you're not casting your net wide enough when thinking about it. For example, consider books of manners in general, or correct behavior for women in particular, in the 19th century, when they were ubiquitous, and apparently very useful due to increased social mobility. Or Dale Carnegie's How to Win Friends etc., which probably outsells all PUA material by a wide margin. Is it possible that some of these have been more successful and effective?

Anyway, thanks for satisfying my curiosity.